@book{m2,
    title = {毛泽东文选（第二卷）},
    author = {中共中央文献研究室},
    year = {1993},
    publisher = {人民出版社}
}

@book{hx,
  author         = {埃德加·斯诺},
  title          = {红星照耀中国},
  publisher      = {人民教育出版社},
  year           = {1937}
}